无网受流列车涡流热效应研究

Research on eddy current thermal effect of non-contact power supply train

非接触电能传输系统中的无网受流列车将受到耦合机构的电磁能量交换的影响,譬如车身、底盘、轨道等金属结构在高频电磁场中会感应出涡流产生热损耗并带来安全隐患.以设计有非接触式供电系统的100%低地板有轨电车为研究对象,先确定耦合结构使用的线圈形状,并基于该耦合结构搭建了简化的整车仿真模型.利用ANSYS软件对列车模型中的车厢、转向架、钢轨等主要部分进行涡流场、温度场仿真分析,得到了列车各部分的具体发热情况.研究结果表明:非接触电能传输系统所构建的高频电磁场将在车体中感应出涡流导致列车部件发热,但所造成的温升对列车的正常运行并无干扰.

The non-grid current train in the contactless power transfer system will be affected by the electromagnetic energy exchange of the coupling mechanism.For example,metal structures such as the body,chassis,and rails will induce eddy currents in the high-frequency electromagnetic field,resulting in heat loss and potential safety hazards.This paper takes a 100% low-floor tram with a noncontact power supply system as the research object,first determines the coil shape used by the coupling structure,and builds a simplified vehicle simulation model based on the coupling structure.Afterwards,ANSYS software is used to simulate and analyze the electromagnetic-eddy current field and temperature field of the main parts of the train model,such as the carriage,bogie,and rail,and summarize the specific heating situation of each part.The results show that the high-frequency electromagnetic field constructed by the contactless power transfer system will induce eddy currents in the train and cause the components to heat up,but the temperature rising would not interfere with the normal operation of the train.